An activated sludge system operates at a flow rate (Q) of 400 m³/day (and an HRT of 0.129 day) with an incoming BOD (So) of 300 mg/L. Through pilot plant work, the kinetic constants for this system are determined to be Y = 0.5 kg SS/kg BOD, Ks = 200 mg/L, and = 2/day. What mixed liquor concentration is necessary to attain a 95% BOD removal? What will the corresponding MCRT be?

Q: 4. A Chemical Engineer was able to extract a fluid from a plant and used it as the liquid in a…

A:

Q: One side of brick mentain at temperature of 40 degree Celsius other side of wall mentain at…

A: One side temperature of wall T1 = 40 oC Otherwise of wall temperature T2 = 60 Wall thickness x = 1 m…

Q: Water is flow through pipe having diameter of 1 meter and flow rate of water is 12 m3/s find out…

A: The velocity of water in pipe is to be determined.

Q: Predict the specific heat, thermal conductivity and thermal diffusivity of a model food at 40°C with…

A: Given that- Temperature of model food, T= 400C Mass composition of food is- Carbohydrate, XH=40%=0.4…

Q: 5.9 A thermometer having a time constant of 1 min is initially at 50 deg C. it is immersed in a bath…

A: Given  Initial temperature of thermometer = 50 oC Time constant T = 1 min   Bath is mentioned at 100…

Q: Dibutyl phthalate (DBP), a plasticizer, has a potential market of 12 million lbm/yr (AICHE Student…

A: It is given that Dibutyl phthalate(DBP) is produced by the reaction of monobutyl phthalate(MBP) with…

Q: One thousand kilograms per hour of a mixture containing equal parts by mass of methanol and water is…

A: A mixture of methanol and water is distilled.

Q: A sample containing 2.3 mol of ideal gas at pressure of 2 bar undergoes constant pressure heating…

A:

Q: 5. A steady-flow water power plant has the following inlet and outlet conditions: Inlet 0 75 400…

A:

Q: 8.1 A step change of magnitude 4 is introduced into a system having the transfer Y(s) 10 X(s) s²…

A:

Q: Calculate the energy associated with a radiation having wavelength 3000 A. Give the answer in kcal…

A:

Q: Water is flow through pipe having diameter of 1 meter and flow rate of water is 12 m3/s find out…

A: Given  Diameter of pipe D  = 1 m Flow rate of water Q = 12 m3/s

Q: Bananas are ripened in an air tight and insulated room by using ethylene  gas at 63 °F. Initially…

A: Given, The temperature of the room, T = 63 °F = 290.37 K The volume of the room, V = 25 m3 The…

Q: Butyric acid is being cooled from 82oC to 60 oC by heat exchange with water entering a shell and…

A: Given Data  Acid is being cooled from  820C to 600C using water that is being heated from 36oC to…

Q: 2. (30 points) An aqueous solution of Na2CO3 contains 12% carbonate and small amounts of soluble…

A:

Q: 2Zn(s) + O2(g) → 2ZnO(s) + 701kJ 1. Solve for the standard enthalpy of formation of ZnO(s) at 298K?…

A: Write the reaction as follows: 2Zns + O2g → 2ZnOs Two moles of Zn reacts with 1 mole of  O2 and…

Q: How much heat is conducted in 4 minutes through a steel plate 4 cm thick having an area of 2.32 m²…

A: Given data are as follows: The thickness of steel plate = 4cm Area of the steel plate = 2.32m2.…

Q: a) Please find out the statement of zeroth law of thermodynamics. b) Mammals (e.g., human beings)…

A: a) The zeroth law of thermodynamics states that if two bodies are each in thermal equilibrium with…

Q: If you are 20 years old and save

A:

Q: the irreversible, liquid-phase, elementary reaction a + b -> 2c is carried out in a pfr under…

A: Given data: Composition of feed by mole % is as follows: A = 25 % B = 50 % Inerts = 25 % Conversion…

Q: Question 9 Choose all liquids that are expected to ignite at room temperature. turpentine (flash…

A:

Q: 4.9-2. Cooling Oil by Water in an Exchanger. Oil flowing at the rate of 5.04 kg/s (Cpm = 2.09 kJ/kg…

A: Given Data The flow rate of oil (mh)=5.04 KgSThe specific heat capacity of oil (Cph)=2.09…

Q: The composition of a gas on a dry basis is 70.0 mol% N₂, 13.0% O₂, 12.0% CO₂, and 5.0% CO. If the…

A: Given, The composition of a gas on dry basis is 70% N2, 13% O2, 12% CO2, 5% CO. Let the moles of the…

Q: 2. Balloons now are used to moved huge trees from their cutting place on mountain slope to…

A: Given, The temperature of balloon, T = 290 K The pressure of the balloon, P = 0.940 atm The mole% of…

Q: The following reaction mechanism has been proposed for the gas-phase reaction of CHC13 and Cl₂: k₁…

A:

Q: According to Chemical Engineering, an important property of fiber is its water absorbency. The…

A:

Q: QUESTION 4 One mole of an ideal gas undergoes isothermal reversible compression to 20% of its…

A:

Q: 5.12. The tank in Fig. 5.20 is full of helium, of molecular weight 4 g/mol, at the same temperature…

A: It is given that tank is full of helium. Given data are as follows: Molecular weight of helium is 4…

Q: A central power plant, rated at 800 000 kW, generates steam at 585 K and discards heat to a river at…

A:

Q: Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition…

A: 100% bainite is formed when the specimen is cooled rapidly to 350°C from 760°C and held for 10's and…

Q: average molecular weight

A:

Q: [Crystallization] One tonne of a 30 % solution of soda ash, Na₂CO3 in water is cooled slowly to…

A:

Q: he quality of a two-phase liquid-vapor mixture of ammonia at -20°F with a specific volume of 11…

A:

Q: In a thermal oxidizer as in Figure 1, the pollutant [Volatile organic compound (VOC), CO, odor] is…

A: Here volatile organic compound is oxidised through high-temperature combustion. Given thermal…

Q: When a liquid mixture is boiled, the vapor that leaves the vessel is enriched in the more volatile…

A: -Test the linear and polynomials models to verify the experimental data: Let us consider the given…

Q: Using Raoult's law or Henry's law for each substance (whichever one you think appropriate),…

A: Given thatxN2 =0.3 mole %     =0.003 xH2O =99.7 mole %  =0.997HN2 =12.6 x 104    atmmole fraction

Q: A hydrocarbon oil of specific gravity 1.15 flows through a schedule 40 carbon steel pipe at a rate…

A: Given, The specific gravity of oil, SG = 1.15 The mass flow rate of oil,  m˙ = 27 tonneshr×1000 kg1…

Q: 1. Given a binary feed that is 40% compound 1, the relative volatility of both compounds is 4, and…

A: Given Data  The feed is given to be binary in nature  with 40 % of compound 1 Xf=0.4The relative…

Q: A gas well is producing at a rate of 15,000 ft/day from a gas reservoir with the presence of…

A: Given data: Pressure= 2,000 psia Temperature = 150 0C or 761.67 0R Specific gravity = 1

Q: 3-41 Water is boiled at sea level (1 atm pressure) in a pan placed on top of a 3-kW electric burner…

A: Given that :power =3 kwp =1 atm

Q: the irreversible, liquid-phase, elementary reaction a + b -> 2c is carried out in a pfr under…

A: Given data: Composition of feed by mole % is as follows: A = 25 % B = 50 % Inerts = 25 %

Q: Long term Trichloroethylene (TCE) exposure has been linked to harmful health effects in humans. A…

A: Given data: Volumetric flow rate = 43.5 m3/min Residence time = 90.8 min Initial concentration of…

Q: 6.83. An equimolar mixture of methane and propane is discharged from a compressor at 5500 kPa and…

A: Introduction:- To raise a fluid's pressure, compressors are employed. The most common type of…

Q: 2. The New York Waterway boat to Hoboken can be modeled as a rectangular box of length, L, width, W,…

A: Given, A boat which is modeled as a rectangular box with length, L, width, W and height, H. The…

Q: 2. Calculate the pH of the following solutions: a. 0.1 M HCI b. 0.1 M NaOH c. 1 nM HCI d. 0.1 M…

A:

Q: thermometer having a time constant of 1 min is initially at 60 deg C. it is immersed in a bath…

A: Given  Time constant T = 1 min Initial temperature = 60 oC Bath temperature  = 100oC

Q: For CO molecule the rotational spectral lines appear at 3.8424 cm^-1 for the transition J = 0 to  J…

A:

Q: 1. The sphericity of a cylinder of 1 mm diameter and 3 mm length is (a) 0.9 (b) 0.78 (c) 0.6 2. The…

A: Given  Diameter of cylinder d = 1 mm Lenght of cylinder = 3 mm

Q: corresponding API?

A:

Q: thermodynamic equation of state:

A: